Wound cell having single-side coated areas

A wound cell, wherein the wound cell comprises a flat-shaped cell formed by winding of a first separator, a first electrode plate, a second separator and a second electrode plate from respective start ends thereof, a first electrode tab is connected with the first electrode plate, a second electrode tab is connected with the second electrode plate;

• the first electrode plate comprises a first current collector with a first active material coated on two opposite surfaces of the first current collector, the second electrode plate comprises a second current collector with a second active material coated on two opposite surfaces of the second current collector,
• wherein an outermost circle of the second electrode plate that is farthest from a center of the wound cell comprises a second single-side coated area, a surface of the second single-side coated area facing the center of the wound cell is a second blank current collector area which is not coated with the second active material and a surface of the second single-side coated area facing away from the center of the wound cell is coated with the second active material, a portion of the first electrode plate opposite to the second blank current collector area comprises a first single-side coated area, a surface of the first single-side coated area away from the center of the wound cell is a first blank current collector area which is not coated with the first active material and a surface of the first single-side coated area facing towards the center of the wound cell is coated with the first active material;
• a tail end of the first electrode plate comprises a first blank foil area, a portion of the second electrode plate opposite to the first blank foil area comprises a second blank foil area;
• with respect to the thickness direction of the flat-shaped cell, a start end of the first blank foil area and a start end of the second single-side coated area are respectively located at two opposite sides of the flat-shaped cell.